Index: trunk/src/plugins/rt_topo/laa1.c
===================================================================
--- trunk/src/plugins/rt_topo/laa1.c	(revision 1469)
+++ trunk/src/plugins/rt_topo/laa1.c	(revision 1470)
@@ -66,10 +66,13 @@
 			e->fixed = 1;
 			e->user_ptr = obj;
 			p1->user_long |= p2->user_long |= e->user_long |= layer_bits(ctx, obj);
+			p1->user_ptr = obj;
+			p2->user_ptr = obj;
 			break;
 		case RTRND_VIA:
 			p1 = laa_mst_add_point(mst, obj->via.x, obj->via.y, -1);
 			p1->user_long |= layer_bits_all(ctx);
+			p1->user_ptr = obj;
 			break;
 
 		case RTRND_ARC:
@@ -89,6 +92,7 @@
 				}
 				p1 = laa_mst_add_point(mst, cx, cy, -1);
 				p1->user_long = layer_bits(ctx, obj);
+				p1->user_ptr = obj;
 			}
 			else {
 #warning TODO: non-terminal poly heuristics
@@ -139,8 +143,18 @@
 	/* collect mst edges as 2-nets */
 	for(n = 0; n < mst.edges.used; n++) {
 		ustn_edge_t *edge = mst.edges.array[n];
-		rt_topo_laa_2net_t *tn = calloc(sizeof(rt_topo_laa_2net_t), 1);
+		rt_topo_laa_2net_t *tn;
+		rtrnd_any_obj_t *o1, *o2;
 
+		/* do not route if start and end are in the same netseg (they are
+		   already connected) */
+		o1 = edge->p1->user_ptr;
+		o2 = edge->p2->user_ptr;
+		if ((o1 != NULL) && (o2 != NULL) && (o1->hdr.netseg == o2->hdr.netseg))
+			continue;
+
+		tn = calloc(sizeof(rt_topo_laa_2net_t), 1);
+
 		/* steiner points are vias, potentially using any layer */
 		if ((edge->p1->user_long == 0) && !edge->p1->fixed) edge->p1->user_long = layer_bits_all(ctx);
 		if ((edge->p2->user_long == 0) && !edge->p2->fixed) edge->p2->user_long = layer_bits_all(ctx);